mono/metadata/mono-endian.h

   1 #ifndef _MONO_METADATA_ENDIAN_H_
   2 #define _MONO_METADATA_ENDIAN_H_ 1
   3
   4 #include <glib.h>
   5
   6 typedef union {
   7         guint32 ival;
   8         float fval;
   9 } mono_rfloat;
  10
  11 typedef union {
  12         guint64 ival;
  13         double fval;
  14         unsigned char cval [8];
  15 } mono_rdouble;
  16
  17 #ifdef ARM_FPU_FPA
  18 #define MONO_DOUBLE_ASSERT_ENDIANITY(dbl_ptr) \
  19         do { \
  20                 mono_rdouble r; \
  21                 r.fval = *dbl_ptr;      \
  22                 r.ival = (guint64) *((guint32 *) r.cval) << 32 |        \
  23                                 *((guint32 *) (r.cval + 4));    \
  24                 *dbl_ptr = r.fval;      \
  25         } while (0)
  26 #else
  27 #define MONO_DOUBLE_ASSERT_ENDIANITY(dbl_ptr)
  28 #endif
  29
  30 #if NO_UNALIGNED_ACCESS
  31
  32 guint16 mono_read16 (const unsigned char *x);
  33 guint32 mono_read32 (const unsigned char *x);
  34 guint64 mono_read64 (const unsigned char *x);
  35
  36 #define read16(x) (mono_read16 ((const unsigned char *)(x)))
  37 #define read32(x) (mono_read32 ((const unsigned char *)(x)))
  38 #define read64(x) (mono_read64 ((const unsigned char *)(x)))
  39
  40 #else
  41
  42 #define read16(x) GUINT16_FROM_LE (*((const guint16 *) (x)))
  43 #define read32(x) GUINT32_FROM_LE (*((const guint32 *) (x)))
  44 #define read64(x) GUINT64_FROM_LE (*((const guint64 *) (x)))
  45
  46 #endif
  47
  48 #define readr4(x,dest)  \
  49         do {    \
  50                 mono_rfloat mf; \
  51                 mf.ival = read32 ((x)); \
  52                 *(dest) = mf.fval;      \
  53         } while (0)
  54
  55 #define readr8(x,dest)  \
  56         do {    \
  57                 mono_rdouble mf;        \
  58                 mf.ival = read64 ((x)); \
  59                 MONO_DOUBLE_ASSERT_ENDIANITY (&mf.fval);        \
  60                 *(dest) = mf.fval;      \
  61         } while (0)
  62
  63 #endif /* _MONO_METADATA_ENDIAN_H_ */